[no abstract available]

LEUNG, L. S. Generation of theta and gamma rhythms in the hippocampus. NEUROSCI BIOBEHAV REV 22(2), 275–290, 1998.—In the behaving rat, theta rhythm was dominant during walking and rapid-eye-movement sleep, while irregular slow activity predominated during immobility and slow-wave sleep. Oscillatory evoked potentials of 20–50 Hz and spontaneous fast (gamma) waves were more prominent during thet...

The N30 component of somatosensory evoked potentials has been recognized as a crucial index of brain sensorimotor processing and has been increasingly used clinically. Previously, we have shown that the N30 is accompanied by both an increase of the power spectrum of the ongoing beta-gamma EEG (event related synchronization, ERS) and by a reorganization (phase-locking) of the spontaneous phase o...

The basal forebrain plays important roles in arousal, learning, and memory by stimulating cortical activation characterized by rhythmic slow theta and high-frequency beta-gamma activities. Although cholinergic neurons play a significant part in these roles, other, including GABAergic, neurons appear to contribute. Using juxtacellular labeling with neurobiotin of neurons recorded within the magn...

patients with valvular heart disease suffer from atrial fibrillation for more than 12 months after valve surgery and have a low probability of remaining in sinus rhythm. we performed an intra-operative procedure similar to surgical maze ііі procedure for conversion of this arrhythmia to sinus rhythm. we did this study to evaluate the efficacy of this procedure to restore the sinus rhythm in pat...

rhythm is a criterion for harmonic music, just in a way that prosody is for poetry. like prosody, rhythm has meters that were called periods or rhythmic periods. rhythmic periods consist of noqrehs (silver) or stresses that are equal to words in poem. present article is to study the science of rhythm and prosody, considering the similarities and dissimilarities in their divisions such as their ...

19 20 Odor signals are conveyed from the olfactory bulb (OB) to the olfactory cortex by two 21 types of projection neurons, tufted cells and mitral cells, which differ in signal timing 22 and firing frequency in response to odor inhalation. Whereas tufted cells respond with 23 early-onset high frequency burst discharges starting at the middle of the inhalation 24 phase of sniff, mitral cells sh...

Odor signals are conveyed from the olfactory bulb (OB) to the olfactory cortex by two types of projection neurons, tufted cells and mitral cells, which differ in signal timing and firing frequency in response to odor inhalation. Whereas tufted cells respond with early-onset high-frequency burst discharges starting at the middle of the inhalation phase of sniff, mitral cells show odor responses ...

Alzheimer's disease (AD) is a multifactorial disorder leading to progressive memory loss and eventually death. In this study, an APPswePS1dE9 AD mouse model has been analyzed for motor cortex theta, beta and gamma frequency alterations using computerized 3D stereotaxic electrode positioning and implantable video-EEG radiotelemetry to perform long-term M1 recordings from both genders considering...